<?php
defined($security_key) or exit;

//------------------------------------------
// Marketing Upload
//------------------------------------------
//Connect to DB
$pdo = dbConnect($dbname);

//SoldTo is empty
if (empty($partner->soldto) || $partner->soldto == ''){$soldto_search = '%';} else {$soldto_search = '-%';}

//default whereclause
list($whereclause,$condition) = getWhereclauselvl2("",$permission,$partner,'');

//BUILD UP PARTNERHIERARCHY FROM USER
$partner_hierarchy = $condition;

//QUERY AND VERIFY ALLOWED
if (isAllowed('marketing',$profile,$permission,'C') === 1){
    if (!isset($_FILES['file'])) {
        echo json_encode(['success' => false, 'error' => 'No file uploaded']);
        exit;
    }
    
    $file = $_FILES['file'];
    $folder_id = $_POST['folder_id'] ?? '';
    $tags = isset($_POST['tags']) ? json_decode($_POST['tags'], true) : [];
    $title = $_POST['title'] ?? pathinfo($file['name'], PATHINFO_FILENAME);
    
    // Validate file type
    $allowedTypes = ['jpg', 'jpeg', 'png', 'gif', 'webp', 'pdf', 'doc', 'docx', 'xls', 'xlsx', 'mp4', 'mov', 'avi'];
    $filename = $file['name'];
    $ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
    
    if (!in_array($ext, $allowedTypes)) {
        echo json_encode(['success' => false, 'error' => 'Invalid file type. Allowed: ' . implode(', ', $allowedTypes)]);
        exit;
    }
    
    $imageTypes = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
    $isImage = in_array($ext, $imageTypes);
    
    // For images over 10MB, automatically compress
    if ($isImage && $file['size'] > 10000000) {
        $compressed = compressImage($file['tmp_name'], $ext, 10000000);
        if ($compressed === false) {
            echo json_encode(['success' => false, 'error' => 'Failed to compress large image. Please reduce file size manually.']);
            exit;
        }
        // Update file size after compression
        $file['size'] = filesize($file['tmp_name']);
    }
    
    // Non-images must be under 10MB
    if (!$isImage && $file['size'] > 10000000) {
        echo json_encode(['success' => false, 'error' => 'File too large. Maximum size is 10MB.']);
        exit;
    }
    
    // Create unique filename
    $unique_filename = uniqid() . '_' . time() . '.' . $ext;
    $target_dir = dirname(__FILE__, 4) . "/marketing/uploads/";
    $target_file = $target_dir . $unique_filename;
    $logical_path = "marketing/uploads/" . $unique_filename;
    
    // Ensure upload directory exists
    if (!file_exists($target_dir)) {
        mkdir($target_dir, 0755, true);
    }
    
    if (move_uploaded_file($file['tmp_name'], $target_file)) {
        // Generate thumbnail for images
        $thumbnail_path = null;
        if (in_array($ext, ['jpg', 'jpeg', 'png', 'gif', 'webp'])) {
            $thumb_dir = $target_dir . "thumbs/";
            if (!file_exists($thumb_dir)) {
                mkdir($thumb_dir, 0755, true);
            }
            
            $thumbnail_file = $thumb_dir . $unique_filename;
            if (generateThumbnail($target_file, $thumbnail_file, 200, 200)) {
                $thumbnail_path = "marketing/uploads/thumbs/" . $unique_filename;
            }
        }
        
        // Insert into database
        $insert_sql = 'INSERT INTO `marketing_files` (`title`, `original_filename`, `file_path`, `thumbnail_path`, `file_type`, `file_size`, `folder_id`, `tags`, `createdby`, `accounthierarchy`) VALUES (?,?,?,?,?,?,?,?,?,?)';
        $stmt = $pdo->prepare($insert_sql);
        $stmt->execute([
            $title,
            $filename,
            $logical_path,
            $thumbnail_path,
            $ext,
            $file['size'],
            $folder_id,
            json_encode($tags),
            $username,
            $partner_hierarchy
        ]);
        
        $file_id = $pdo->lastInsertId();
        
        // Insert tags into separate table
        if (!empty($tags)) {
            $tag_sql = 'INSERT IGNORE INTO `marketing_tags` (`tag_name`) VALUES (?)';
            $tag_stmt = $pdo->prepare($tag_sql);
            
            $file_tag_sql = 'INSERT INTO `marketing_file_tags` (`file_id`, `tag_id`) SELECT ?, id FROM marketing_tags WHERE tag_name = ?';
            $file_tag_stmt = $pdo->prepare($file_tag_sql);
            
            foreach ($tags as $tag) {
                $tag_stmt->execute([trim($tag)]);
                $file_tag_stmt->execute([$file_id, trim($tag)]);
            }
        }
        
        echo json_encode([
            'success' => true,
            'file_id' => $file_id,
            'path' => $logical_path,
            'thumbnail' => $thumbnail_path,
            'message' => 'File uploaded successfully'
        ]);
        
    } else {
        echo json_encode(['success' => false, 'error' => 'Failed to move uploaded file']);
    }
} else {
    echo json_encode(['success' => false, 'error' => 'Insufficient permissions']);
}

// Function to compress large images
function compressImage($source, $ext, $maxSize) {
    $info = @getimagesize($source);
    if ($info === false) return false;
    
    $mime = $info['mime'];
    
    // Load image
    switch ($mime) {
        case 'image/jpeg':
            $image = @imagecreatefromjpeg($source);
            break;
        case 'image/png':
            $image = @imagecreatefrompng($source);
            break;
        case 'image/gif':
            $image = @imagecreatefromgif($source);
            break;
        case 'image/webp':
            $image = @imagecreatefromwebp($source);
            break;
        default:
            return false;
    }
    
    if ($image === false) return false;
    
    $width = imagesx($image);
    $height = imagesy($image);
    
    // Start with 90% quality and reduce dimensions if needed
    $quality = 90;
    $scale = 1.0;
    $tempFile = $source . '.tmp';
    
    // Try progressive compression
    while (true) {
        // Calculate new dimensions
        $newWidth = (int)($width * $scale);
        $newHeight = (int)($height * $scale);
        
        // Create resized image
        $resized = imagecreatetruecolor($newWidth, $newHeight);
        
        // Preserve transparency for PNG/GIF
        if ($mime === 'image/png' || $mime === 'image/gif') {
            imagealphablending($resized, false);
            imagesavealpha($resized, true);
            $transparent = imagecolorallocatealpha($resized, 255, 255, 255, 127);
            imagefilledrectangle($resized, 0, 0, $newWidth, $newHeight, $transparent);
        }
        
        imagecopyresampled($resized, $image, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
        
        // Save with current quality
        if ($ext === 'jpg' || $ext === 'jpeg') {
            imagejpeg($resized, $tempFile, $quality);
        } elseif ($ext === 'png') {
            // PNG compression level (0-9, where 9 is best compression)
            $pngQuality = (int)((100 - $quality) / 11);
            imagepng($resized, $tempFile, $pngQuality);
        } elseif ($ext === 'webp') {
            imagewebp($resized, $tempFile, $quality);
        } else {
            imagegif($resized, $tempFile);
        }
        
        imagedestroy($resized);
        
        $fileSize = filesize($tempFile);
        
        // If file is small enough, use it
        if ($fileSize <= $maxSize) {
            imagedestroy($image);
            rename($tempFile, $source);
            return true;
        }
        
        // If we've reduced too much, give up
        if ($quality < 50 && $scale < 0.5) {
            imagedestroy($image);
            @unlink($tempFile);
            return false;
        }
        
        // Reduce quality or scale
        if ($quality > 50) {
            $quality -= 10;
        } else {
            $scale -= 0.1;
        }
    }
}

// Function to generate thumbnail
function generateThumbnail($source, $destination, $width, $height) {
    $info = getimagesize($source);
    if ($info === false) return false;
    
    $mime = $info['mime'];
    
    switch ($mime) {
        case 'image/jpeg':
            $image = imagecreatefromjpeg($source);
            break;
        case 'image/png':
            $image = imagecreatefrompng($source);
            break;
        case 'image/gif':
            $image = imagecreatefromgif($source);
            break;
        case 'image/webp':
            $image = imagecreatefromwebp($source);
            break;
        default:
            return false;
    }
    
    if ($image === false) return false;
    
    $original_width = imagesx($image);
    $original_height = imagesy($image);
    
    // Calculate aspect ratio
    $aspect_ratio = $original_width / $original_height;
    
    if ($width / $height > $aspect_ratio) {
        $new_width = $height * $aspect_ratio;
        $new_height = $height;
    } else {
        $new_height = $width / $aspect_ratio;
        $new_width = $width;
    }
    
    $thumbnail = imagecreatetruecolor($new_width, $new_height);
    
    // Preserve transparency
    imagealphablending($thumbnail, false);
    imagesavealpha($thumbnail, true);
    $transparent = imagecolorallocatealpha($thumbnail, 255, 255, 255, 127);
    imagefilledrectangle($thumbnail, 0, 0, $new_width, $new_height, $transparent);
    
    imagecopyresampled($thumbnail, $image, 0, 0, 0, 0, $new_width, $new_height, $original_width, $original_height);
    
    // Save thumbnail
    switch ($mime) {
        case 'image/jpeg':
            $result = imagejpeg($thumbnail, $destination, 85);
            break;
        case 'image/png':
            $result = imagepng($thumbnail, $destination, 8);
            break;
        case 'image/gif':
            $result = imagegif($thumbnail, $destination);
            break;
        case 'image/webp':
            $result = imagewebp($thumbnail, $destination, 85);
            break;
        default:
            $result = false;
    }
    
    imagedestroy($image);
    imagedestroy($thumbnail);
    
    return $result;
}

?>